题目内容：

    A few years back I worked in a university building that also housed an entire department full of psychologists, all of whom seemed to see us as perfect guinea pigs(实验对象） for their latest studies. I learned to be cautious about answering seemingly casual  questions in the elevator. If one of them showed up in my office bearing a plate of snacks and asked me to pick some, I'd cast a doubtful glance and ask "Why?" before grabbing the apple fritter.

So one day, when someone from the Psychology Department posted instructions in the bathroom advising us to think about five things you're grateful for every day for a week, my response was frankly suspicious. I did the math. Five things a day for seven days is a lot of brainpower to consume without so much as the promise of an apple fritter.

I wandered into the office of Zetzer, the director of our school's Psychological Services Clinic. That was when I first heard the term" positive psychology" and discovered that "the gratitude thing", as Heidi had explained it. "It's only a week, "she urged. "Try it. ” So I did.

I started looking for my five moments of gratitude in each day. By the end of that  week, I found myself slowing down a little and taking time to notice things I might have walked past before, including a bunch of young students laughing together, They are so smart and optimistic, giving me so much hope for the future!

I couldn't be more grateful to my wonderful husband. He's a great cook. He always puts our family first. My oldest son took his vacation to come and help out at home. He took me to all my medical appointments, and made me laugh by titling his spring break "Driving Miss Leslie. "The kindness of a colleague with a green thumb made sure my plants stayed alive until I could care for them again.

Life will never be perfect, I still see news stories that distress me. But with just one simple exercise, I'm rediscovering the deep meaning of old sayings: accepting the things I cannot change, working to change what I can, and being wise enough to know the difference.

And all it took was a little gratitude.

1.Why did the author hesitate about the snacks offered by psychologists?

A.She had no appetite for snacks.

B.She didn't think snacks could show gratitude.

C.She disliked those psychologists.

D.She cared about what to be paid for them.

2.What can we infer from the second paragraph of the passage?

A.The instructions seemed to make sense to Leslie.

B.No one would behave as the instructions suggested.

C.Leslie had no intention of following the instructions.

D.The psychologists were actually playing a joke.

3.What did Leslie achieve at last?

A.She overcame her psychological problem.

B.She realized how hard it was to be grateful.

C.She found Heidi was really a reliable doctor.

D.She learned to be positive and show gratitude.